TNS-12650: No common encryption or data integrity algorithm

Hi,

Sometimes You can get “TNS-12650: No common encryption or data integrity algorithm ” error.

Details of error are as follows.

TNS-12650: No common encryption or data integrity algorithm

Encryption and data integrity are required at the network level for security. The chosen standard for the Oracle 12.2 Checksum Level rollout is SHA256 or higher.

For this, the following ASO properties are configured in the database sqlnet.ora file:

#require encryption
SQLNET.ENCRYPTION_SERVER = REQUIRED
SQLNET.ENCRYPTION_TYPES_SERVER=(aes128, aes192, aes256) 

#require checksum 
SQLNET.CRYPTO_CHECKSUM_SERVER=required 
SQLNET.CRYPTO_CHECKSUM_TYPES_SERVER=(sha256)

When trying to connect from a JDBC thin 11g program to this database, the connection fails with:

java.sql.SQLException: Oracle Error ORA-12650
  at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:800)
  at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:793)
  at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33)
  at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:614)
...
Caused by: oracle.net.ns.NetException: Oracle Error ORA-12650
  at oracle.net.ano.Ano.negotiation(Unknown Source)
  at oracle.net.ns.NSProtocol.connect(NSProtocol.java:308)
  at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1606)
  at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:539)
  ... 27 more

Do you want to learn more details about RMAN, then read the following articles.

https://ittutorial.org/rman-backup-restore-and-recovery-tutorials-for-beginners-in-the-oracle-database/